JPS6154355A - Vibration-damping means for mechanical spring in railway rolling stock - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to vibration control in compensatory springs in railway vehicles. Regarding FII damping means.

Vibrations, surges and noise generated by mechanical springs in railway vehicles are generally transmitted to the vehicle body. This causes discomfort to passengers.

Vibrations, surges and noise are caused by various operating conditions. For example, a gluteal spring has a natural frequency at which its opening spring moves I5. The sudden shock transmitted from the track creates surges and noise in the springs, which are transmitted to the vehicle body.

Conventional Technology Regarding mechanical springs, various types of mechanical springs have been used in the past. These damping sons were generally placed at the top and bottom of one mechanical spring. Such a configuration is completely acceptable when applied to railway vehicles, especially when mechanical springs are arranged in a double arrangement, one spring being placed inside the other with some space between them. That wasn't the point.

Patents related to spring damping include the following:

U.S. Patent Nos. 3.795.390, 3.977, 70
No. 0, No. 3, 7G2.694, No. 2.660.42
No. 3, No. 2.822, 165.

No. 3.206□184.

OBJECTS AND CONSTRUCTION OF THE INVENTION One object of the present invention is to provide an improved damping member for use in mechanical springs in railroad vehicles.

A further object of the invention is to provide improved damping means for minimizing vibration, noise and surge transmission from mechanical springs to the vehicle body.

It is a further object of the present invention to provide an improved damping means for a two-wheel spring in which one spring is placed inside the other spring spaced apart with respect to each other.

A further object of the present invention is to provide an improved damping means for minimizing the transmission of impact forces from the truck to the strut springs.

In the present invention, a special coil spring is arranged between the vehicle body and the bogie. Damping means are provided to damp vibrations, surges and noise developed in the spring and prevent them from being transmitted to the spring. is in contact with.

Other objects and features of the present invention will become apparent to those skilled in the art upon reading the appended claims and the following description with reference to the accompanying drawings.

DESCRIPTION OF THE EMBODIMENTS Referring to FIG.
714. The vehicle body 12 may have a cup-shaped portion 16 as an integral part and receive a damping member 18 therein.

The truck 14 has a bolster 20 and a member 22 in which a damping member 24 is disposed.

The illustrated example of actual fJL6 necessarily includes a continuous damping material, which can be made of an elastic material, a fibrous material, or a leather uniform material. Depending on the particular design requirements, it may be necessary to provide damping members only at one end of the spring, either the top or the bottom.

In some cases, it may be desirable to provide damping members at both the top and bottom of the spring 10, as shown. The advantage of having damping members at both ends is that damping member 18 provides insulation between spring 10 and car body 12, and damping member 24 provides insulation between truck 14 and spring 10. As a result, any shocks caused by irregularities in the track are damped to a minimum by the member 24.

The actual resonance of the spring 10 within the area (any vibrations resulting from the turbulent cycle are damped by damping material or members 18 and 24).
isolated from the vehicle body.

Note that members 18 and 24 physically overlap the top turns and bottom turns of spring 10. This provides much greater damping than in the prior art, where the damping member was directly attached to the top or bottom of the spring member.

Referring to FIG. 2, an embodiment somewhat similar to that shown in FIG. 1 is shown. The mechanical spring 26 is
It is arranged between the vehicle body 28 and the truck 30. Cup-like elements 32 and 34 have damping elements 36 and 38, respectively. The cup-shaped element and the damping member are separate members from the car body and the truck. This allows those elements or one
The manufacturing of the elements or parts is facilitated and they are secured to the vehicle body or truck by mechanical means such as screws 40. The basic functions of the embodiments shown in Fig. 1 and Fig. 2 are the same.
In the color example, the cup-shaped element and the damping member are assembled separately during the manufacturing process and are coupled to the car body and truck as a unit.

In the embodiment shown in FIG. The damping part holding means 50 presses the damping member /I8 against the spring 42, and vibrations or surges are about to occur in the snow ring. to suppress

4 and 5, a pair of spaced apart mechanical springs 52,54 are positioned between the carbody 56 and the truck 48. Such a two-wheel spring arrangement was given to Digi (Dean)! This U.S. Patent No. 3.580.5
No. 57 is known and illustrated.

A plurality of strips 60 are inserted into the gap between springs 52 and 54 and contact several turns in springs 52 and 54. These strips are made of a suitable damping material, such as an elastic material. These strips are held apart from each other to suppress surges during firing of the spring. Furthermore, since the springs are held so as not to contact each other, the generation of additional noise and surges that would occur if they were in contact are reduced and are not transmitted to the vehicle body 56.

In Figure 6, Figure 7 J'3 and Figure 8, a pair of temples IAt
A target spring 62 or 6/I is arranged between the vehicle body 66 and the bogie G8. The top cap element 70 is located between the upper ends BII of the springs 62 and 64 and the vehicle body 6G. Similarly, bottom kick element 72 is located between the lower ends of springs 62 and 64 and carriage 68. Cap elements 70 and 72 are identical in design and therefore only IC bottom cap strand 72 is shown in FIG. 8 and will be described in detail.

It should be understood that the 11i section kissep element 70 functions similarly to the bottom cap element 72.

Bottom cap element 72 defines a base 74 and a plurality of fork elements 76 extending therefrom.

The fork-shaped elements 76 are interconnected by a circuit 78 surrounding them.

These cap elements 70 and 72 are connected to the spring 62
and 64.

When the cap element is inserted, the protruding fork elements 76 and the surrounding portions 78 engage the upper and lower shallow springs of the springs 62 and 64.

These cap elements 7o and 72 are made of a suitable damping material, such as an elastic material, a textile material or a leatherette material. These cap elements 70, 72 are suitably stamped and molded as an integral part to form a pair of [I
It is easily inserted between the springs.

[Brief explanation of drawings]

1 is a sectional view of a mechanical spring with damping means according to the invention arranged between a bogie and a car body; FIGS. 2 and 3 show different mechanical springs with damping means according to the invention, respectively FIG. 4 is a partial sectional view of another embodiment of the present invention, and FIG. 5 is a partial sectional view of another embodiment of the present invention.
6 is a partial sectional view of another embodiment of the present invention, FIG. 7 is a sectional view taken along line 7-7 of FIG. 6, and FIG. 8 is a cross-sectional view of the bottom cap of FIG. 6. FIG. 3 is a perspective view of the element. Explanation of symbols

Claims (7)

[Claims] (1) used in combination with a car body and a bogie; (a) a mechanical coil spring is coupled between the car body and the bogie; (b) a damping member is coupled to the car body and extends downwardly therefrom; A means for damping vibrations of a mechanical spring in a railway vehicle, characterized in that the vibration damping means for a mechanical spring in a railway vehicle is extended to a portion of the coil spring and is engaged with several turns at the top of the coil spring. (2) The vibration damping means according to claim 1, wherein the damping member is received in a cup-shaped member fixed to the vehicle body, and vibration of a mechanical spring in a railway vehicle. damping means. (3) In the vibration damping means according to claim 2, the damping member is received within a second cup member fixed to the truck, and the damping member extends upwardly to Means for damping vibrations of a mechanical spring in a railway vehicle, characterized in that the vibration damping means of a mechanical spring is engaged with a number of turns at the bottom of a coil spring. (4) used in combination with a car body and a bogie, (a) a mechanical coil spring is coupled between the car body and the bogie, and (b) a damping member is provided between the top and bottom of the coil spring. is arranged around the coil spring and engaged with the middle turns, and (c) the holding member presses and holds the damping member against the middle turn. Vibration damping means for mechanical springs in railway vehicles. (5) used in combination with a car body and a bogie, (a) a first inner mechanical coil spring coupled between the car body and the bogie; (b) a second outer mechanical coil spring; a spring is secured between the body and the truck surrounding the first coil spring; (c) a plurality of spaced apart strips of damping material are connected to the first and second coil springs;
A vibration damping means for a mechanical spring in a railway vehicle, characterized in that the vibration damping means is arranged between and in contact with a coil spring. (6) used in combination with a car body and a bogie, (a) a first inner mechanical coil spring coupled between the car body and the bogie; (b) a second outer mechanical coil spring; a spring is fixed between the vehicle body and the truck, surrounding the first coil spring; (c) the cap member is made of a damping material; (d) the cap member has a flat circular shape; and a plurality of fork-like portions extending from the base; (e) the fork-like portions have a circumferential portion interconnecting the fork-like portions; and (f) the cap member comprises: inserted into a gap between the first and second coil springs, the circumference being dimensioned to physically engage the turns at one end of the first and second coil springs; Vibration damping means for mechanical springs in railway vehicles. (7) The vibration damping means according to claim 6, wherein a pair of cap members are inserted into opposing ends of the first and second coil springs. Vibration damping means.